2 KEYS. THE FAN BELT SNAPPED AND MANAGED TO FIND ITS WAY INTO THE TIMING COVER.....We have removed the timing cover and checked timing, the camshaft had jumped 4 teeth so we locked cam crank and pump and re timed, it started briefly ran horrible was missing and now wont start. even when timed up correctly its turning over fast. Its bent some Valves, im sure if your in the trade then its labour and valves.